Jaw Fractures Happens Jaw fractures are among the most common facial fractures and can encompass the fracture of either the upper jaw (maxilla), the lower jaw (mandible), or both. It is defined as: “a condition where there is a break or crack in the mandible or maxilla bones. It often results from facial trauma, such as accidents, falls, or sports injuries, and can lead to difficulty in speaking, eating, and breathing.”[1] They present with pain, swelling, and difficulty opening the mouth. Prompt medical evaluation is required, and treatment depends on the fracture type, displacement, and associated injuries.
Panoramic X-ray showing a minimally displaced fracture of the right side of the lower jaw (mandible), with an arrow indicating the fracture lines through both ends of the bone. Image sourced fromWikimedia Commons, originally uploaded by Coronation Dental Specialty Group under a Creative Commons Attribution 3.0 Unported license.
Anatomy of the jaw: Jaw Fractures Happens
Our jaw consists of two segments: the upper jaw (maxilla) and the lower jaw (mandible). The upper jaw (maxilla) is fixed, whereas the lower jaw is movable via the temporomandibular joint (TMJ).
Maxillary (upper jaw) Anatomy:
The maxilla is a pyramid-shaped bone that makes up the upper jaw. It extends to the floor of the eye sockets and also contributes to the nasal cavity and hard palate. It has a pyramid-shaped body, which contains the maxillary sinus, the largest sinus in our skull. 4 processes extend from the body:
- The alveolar process: It holds and houses the upper teeth
- The palatine processes make up the hard palate
- The zygomatic processes extend sideways and attach to our zygomatic bone, making our “cheekbones.”
- The frontal processes extend upward and connect to the frontal bone (forehead).
Anterior view of the human maxilla (upper jaw bone), displayed in green, illustrating its anatomical position within the facial skeleton. Image sourced fromWikimedia Commons; created by Anatomography from BodyParts3D / Database Center for Life Science (DBCLS), licensed under Creative Commons Attribution-ShareAlike 2.1 Japan (CC BY-SA 2.1 JP).
Mandibular (lower jaw) Anatomy:
It is a horseshoe-shaped bone that is connected to the skull via a circular “condyle.” The condyle sits in the temporal bone and creates a hinge joint called the “temporomandibular joint.” This joint aids in the opening, closing, and sideways movements of the jaw, enabling normal functions like speaking, eating, chewing, or yawning.
Anterior and lateral view of the human mandible (lower jawbone) illustrating its overall anatomical shape. Image sourced fromWikimedia Commons; created by Anatomography from BodyParts3D / Database Center for Life Science (DBCLS), licensed under Creative Commons Attribution-ShareAlike 2.1 Japan (CC BY-SA 2.1 JP).
Types of Jaw Fractures
Maxillary Fractures
Maxillary fractures can be classified in many ways, but the most accepted and widely used system for upper jaw and midface fractures is the “Le Fort classification”:[2]
- Le Fort I (Horizontal): The fracture line passes horizontally, above the roots of teeth, separating the alveolar process and palate. It involves the walls of the maxillary sinus and can involve the nasal septum if it’s bilateral. This type of fracture occurs due to a downward force on the maxilla.
- Le Fort II (Pyramidal): The fracture line runs from the nasal bridge through the frontal process, infraorbital (floor of eye socket) margin, and maxillary sinus. It can damage the infraorbital nerve, resulting in sensory loss to the midface. You may experience this type of fracture due to high-energy impact on the lower or mid maxilla.
- Le Fort III (Craniofacial disjunction): The fracture line passes through the zygomatic arches, orbital walls, and nasal bones, completely separating the midface (including the maxilla) from the cranial base. This severe fracture usually results from high-energy trauma to the midface.
Oblique diagram of a human skull illustratingLe Fort types I (red), II (blue), and III (green) midface fracture patterns.Image sourced fromWikimedia Commons; original drawing by RosarioVanTulpe, licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported and compatible licenses.
Mandibular Fractures:
A mandibular fracture can be classified according to cause, pattern of the fracture, or the site. Most commonly, fractures are classified according to the area, as described below and illustrated in the picture.[3]
- Condyle: The condyle is the part of the mandible that fits into the temporal bone and creates the TMJ. This is the most common site of fracture in any case of assaults, motor vehicle accidents, or falls. This is because the backward blunt force that is applied to the mandible causes the mandible to move posteriorly. The posterior or backward movement of the mandible is stopped by the temporal bone; thus, it fractures under stress.
- Coronoid Process: Fractures are rare and usually occur due to direct trauma or strong temporalis muscle pull.
- Symphysis/Parasymphysis: This fracture occurs near the chin in the midline (symphysis) or just to the side behind it (parasymphysis).
- Body: The fracture occurs through the main, horizontal part of the jaw, usually occurring after the canine.
- Angle: The corner of the jaw is called the angle. Due to the diagonal placement of the wisdom tooth in that area, or the reduction of bone height due to age, pathological fractures are common in this area.
- Ramus: It is the vertical part connecting to the skull.
Diagram illustrating patterns of mandibular fractures, including symphyseal, parasymphyseal, body, angle, ramus, condylar, and coronoid process fractures, used for clinical classification and surgical planning.This image is sourced fromWikimedia Commonsand is in the public domain (or under its listed license). Image credit: “Mandibular fractures.png,” via Wikimedia Commons.
How can your jaw fracture?
Your jaw can fracture due to direct blunt force to the face, especially in the chin or midface area. The most common causes of jaw fractures are:
- Motor Vehicle Accidents: High-impact collisions in cars, bikes, or heavy vehicles are one of the most common causes of jaw fractures.[4]
- Falls: If you slip and fall face-first, and your jaw hits a hard surface, the blunt force can cause your jaw to break.
- Assaults: Being involved in a fight, especially if someone throws a punch at your face, is a major cause in developed countries.[5]
- Sports Injuries: If you play sports that include player-to-player collisions, such as boxing and football, it can cause significant force to the jaw.
- Occupational Accidents: Workplace accidents such as falling objects at construction sites, or malfunctioning heavy equipment, can also lead to jaw trauma.[6]
Signs and Symptoms of Fractured Jaw
After you have experienced blunt force on your face, you may notice the following signs and symptoms associated with your injury:
- Pain: You will feel intense pain in your jaws, especially when moving them or trying to talk.
- Swelling: Your jaw will be intensely swollen due to the break in your bones.
- Malocclusion: Your bite will change, since the jaws no longer fit in as they used to. A part of your jaw is fractured, causing it to deviate and not occlude properly.
- Difficulty opening the mouth: Due to the crack in your jaw and significant pain and swelling associated with it, you might not be able to open your mouth as you used to. Speaking or swallowing may become difficult.
- Numbness: If your lower jaw (mandible) is fractured, it can cause nerve (inferior alveolar nerve) damage, and you may feel numbness in your lip or tongue.
- Bleeding: If the fracture line extends intra-orally, there may be significant bleeding.
- Loose teeth: The location of the fracture determines the involvement of teeth and may result in mobile teeth.
What to expect after your jaw is fractured?
If you experience trauma to your face that involves severe pain, bleeding, loose teeth, or a dislocated feeling in your jaws, seek emergency medical care immediately. You can stabilize your jaw with a scarf, a cloth, or your hand to prevent unnecessary movement. Avoid talking, eating, or drinking. Jaw fractures can obstruct your airways, so in case of difficulty in breathing, the medical professional may put a tube to ensure a patent airway.
At the medical facility, the doctor will perform a physical exam, checking for swelling, tenderness, jaw movements, etc. He will order some radiographic evaluations to be done, such as a panoramic x-ray (OPG) or CT/CBCT, which is now the imaging modality of choice for complex fractures.
In severe fractures, a blood workup may be done to prepare you for surgery under general anesthesia.
3D CT reconstruction of bilateral mandible fractures showing complex fractures of the mandibular body and ramus on both sides, useful for preoperative assessment and surgical planning. This image is sourced fromWikimedia Commonsand is licensed under the Creative Commons Attribution-ShareAlike (CC BY-SA) license. Image credit: “3D CT of bilateral mandible fracture.jpg,” via Wikimedia Commons.
How is a Jaw Fracture Treated?
The treatment of jaw fractures depends primarily on the extent and type of fracture that has occurred.
Minor or Hairline fracture:
Minor cracks or a hairline fracture of the jaw are managed by pain relief, a liquid or soft diet, and rest. The doctor may monitor the crack to ensure adequate healing. Invasive or long-term treatments are not required for hairline fractures or minor cracks.[7]
Mild fractures:
If you experience a closed fracture, where the jaw is fractured, but bones are not exposed or severely displaced, your healthcare provider will treat it in the following way:
- Immobilization of the jaws: Maxillomandibular fixation (MMF) or Intermaxillary fixation (IMF) are terms used for the procedure that is used to immobilize the jaws. Wires, splints, or orthodontic brackets (if already present) can be used to tie both jaws shut for four to six weeks. This will ensure that the bones remain in position while they heal.
- Liquid or Soft diet: Since your jaws will be immobilized, you will be put on a liquid diet that you can consume via a syringe or spoon.
- Pain Management: Your physician will prescribe painkillers to relieve pain during the healing process.
- Oral Hygiene practices: Specialized techniques and brushes will be used to maintain good oral hygiene during this time period.
Closed, non-displaced fractures may be treated with short-term immobilization using MMF/IMF for a limited duration (often 1–2 weeks) or sometimes without fixation, depending on stability.
Moderate to Severe fractures:
If you experience severe facial trauma that results in an open fracture, a dislocated jaw, moving fragments, or extensive deformity, you may need surgery. Your physician may choose the following treatment plan:
- Open Reduction and Internal Fixation (ORIF):[8] This is a surgical procedure in which the jaw is opened up via an incision and reduced to its original position. Then, it is stabilized by titanium plates, rods, or screws (internal fixation).
- MMF or IMF: The jaw is then sealed shut via maxillo-mandibular fixation for six to eight weeks to promote healing. However, it May also be used temporarily or avoided entirely when rigid fixation provides adequate stability.
- Medications: Antibiotics are given to prevent infection after surgery. Painkillers are prescribed for pain relief.
- Rest: Giving time for the jaw to heal is crucial after surgery. Excessive activity can cause bleeding or dizziness.
Jaw Fracture Recovery
- You will experience pain and swelling in one to seven days following surgery. Use an ice pack (intervals of 30 minutes on and off) on the region for the first 24 hours, and then use a warm compress to promote healing.
- A liquid or soft diet will be given to you because the immobilization of the jaw will prevent you from chewing or using your teeth.
- Resting is key. Avoid strenuous exercise or excessive movement of the head. It may cause bleeding and delay recovery.
- Jaw physiotherapy and gradual mouth-opening exercises are important after immobilization to prevent stiffness or TMJ dysfunction.
- Initial healing is quick, taking about six to eight weeks (or one to two months), but proper healing and strong bone formation may take up to a year. You can slowly get back to your normal routine within three to six months of the surgery.
Wrap Up
Jaw fractures are significant injuries that can affect essential functions such as chewing, speaking, and breathing, as well as facial appearance and overall quality of life. They occur due to trauma to the face, and prompt diagnosis and appropriate management are crucial to prevent complications such as infection, malocclusion, chronic pain, or long-term functional impairment. With timely medical attention and proper rehabilitation, most patients can expect good functional and aesthetic outcomes.
References
[1] Jaw Fracture, Broken Jaw [Internet]. Yale Medicine. 2025.
[2] Patel BC, Wright T, Waseem M. Le Fort Fractures [Internet]. PubMed. Treasure Island (FL): StatPearls Publishing; 2020.
[3] Mihailova H. CLASSIFICATIONS OF MANDIBULAR FRAC- TURES-REVIEW. Journal of IMAB -Annual Proceeding (Scientific Papers) [Internet]. 2006;12(2).
[4] Murray JF, Hall HC. Fractures of the mandible in motor vehicle accidents. Clinics in plastic surgery [Internet]. 1975 Jan;2(1):131–42.
[5] ACO Olojede, OM Gbotolorun, OM Ogundana, IC Emeka, Emmanuel M, SAB Oluseye, et al. PATTERN OF ASSAULT-RELATED MAXILLOFACIAL INJURIES TREATED AT THE GENERAL HOSPITAL, LAGOS, NIGERIA. Journal of the West African College of Surgeons [Internet]. 2016 Jul [cited 2026 Jan 4];6(3):68.
[6] Lee KH, Chou HJ. Facial fractures in work-related injuries. Asian Journal of Oral and Maxillofacial Surgery. 2010 Sep;22(3):138–42.
[7] British J Oral Maxillofac Surg. Outcomes of non-surgical management of non-condylar mandibular fractures: a systematic review and meta-analysis.Br J Oral Maxillofac Surg.2024;62(9):761-768.
[8] Sayed El-Ahl M, Amer H, El-Anwar M. Open Reduction and Internal Fixation of Mandibular Fracture without Rigid Maxillomandibular Fixation. International Archives of Otorhinolaryngology. 2015 Mar 30;19(04):314–8.
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